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Aristea bakeri; photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIF CC BY-SANicola van Berkel, CC BY-SA, iNaturalist via GBIF

Aristea bakeri Klatt

Tall Capeblue

Iridaceae · Cape Provinces · listed by its family as a bulb, tuber or caudex

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Aristea bakeri, photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIFAristea bakeri, photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIFAristea bakeri, photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIFAristea bakeri, photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIFAristea bakeri, photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIFAristea bakeri, photograph Nicola van Berkel, CC BY-SA, iNaturalist via GBIF 24 photographs ›
Habitat figures
Cold floor (1 night in 100)
6.2°C
Record low 3.9 °C in 44 years, at a typical spot in the range NASA POWER
Warmest month, mean daily high
24°C
Jan and Feb at the habitat CHELSA
Rain a year (median across the range)
841mm
12 months of 25 mm or more in the median year CHELSA
Open-sky light
16–50DLI
Lowest to highest month (DLI) CHELSA
The year in your months, northern hemisphere
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Wet winters: the rain comes October to April (April to October at the habitat), read as a winter growing season. rain rule, CHELSA
Northern hemisphere unless you set your site. The chart is in the habitat's months.

Summary

Aristea bakeri is a plant species in the family Iridaceae.

Quoted from Wikipedia, "Aristea bakeri", CC BY-SA 4.0.

Cultivation

Grouped as a bulb, tuber or caudex, listed under the family Iridaceae in the archetype table, and Kew describes it as “rhizomatous geophyte”.

Seasons

The rain rule reads a winter growing season: 70% of the median year's rain (613 mm of 846 mm) falls in April to October, cooler than the year (wet-season mean 13.4 °C against a yearly mean of 15.5 °C). Months are the habitat's, southern hemisphere; shifted six months for a northern-hemisphere collection: October to April.

Rain

846 mm in the median year at the habitat, 613 mm of it April to October. Wettest month July at 115 mm, driest month February at 34 mm. Across the grid cells of the range the year's total runs 524 mm to 1,923 mm, the 10th to 90th percentile of each cell's own year. The median of the cells' own yearly totals, 841 mm, is the year's rain at the top of the page; the 846 mm here is the median year's, the twelve monthly medians added, which the rain rule reads. Habitat calendar, southern hemisphere; median year across the grid cells of the range, CHELSA.

Light

Open sky over the habitat: 16 to 50 mol/m²/day across the year (daily light integral, median year across the grid cells of the range, CHELSA; the lowest 10th-percentile month across the cells is 15, the highest 90th-percentile month 53).

Warmth and air
Temperature

Coldest: the 1st-percentile night over 44 years at a typical spot in the range is 6.2 °C, the absolute minimum 3.9 °C, no frost in 44 years (NASA POWER daily minima). Warmest: the 99th-percentile day is 30.9 °C. Monthly means: the coldest month's mean nightly low 7.0 °C in July (across the grid cells of the range 3.6 °C to 11.3 °C), the warmest month's mean daily high 24.3 °C in February (median year across the grid cells of the range, CHELSA). Cold floor: 6.2 °C, which is the 1st-percentile night over 44 years at a typical spot in the range (NASA POWER).

Humidity

Relative humidity at the habitat: 58 to 61% across the year (monthly means, median year across the grid cells of the range, CHELSA). A figure about the air, saying nothing about how the plant takes water.

How this section is made

Each card states this species' habitat figures with their sources, and what two fixed rules read from them; nothing here says what the plant does, wants or tolerates. The rules · the terms.

Seasons. Read from the median year of CHELSA monthly rainfall and mean temperature across the grid cells of the range: the rain rule takes the smallest set of months carrying 70% of the rain and calls it winter when its mean is more than half a degree below the year's, summer when more than that above, and neither in between; the temperature rule, used only under 120 mm, names the cooler six months when they are at least a degree cooler than the other six. Months are shifted for the other hemisphere only where the temperature curve moves 4 °C or more and the habitat lies 10° or more from the equator. A reading of the curves, not an observation of the plant.

Rain. CHELSA monthly precipitation, median year across the grid cells of the range. The rain that falls where the species is recorded; nothing about how the plant takes water.

Light. CHELSA shortwave radiation at each envelope cell, a daily-mean flux taken to a daily total and converted at 2.07 mol of PAR per MJ. The sky over the habitat, measured; what reaches a plant under a rock, a shrub or a shade cloth is not.

Temperature. NASA POWER daily minima and maxima over 44 years at a typical spot in the range, lapse-corrected +140 m to its elevation; CHELSA monthly means, median year across the grid cells of the range. The cold floor is the 1st-percentile night named in its sentence. Not a measured survival limit for any plant in a pot.

Humidity. CHELSA relative humidity, median year across the grid cells of the range.

Group. Listed under the family Iridaceae in the archetype table, and Kew describes it as “rhizomatous geophyte”. A group is taken only where Kew's description of the species agrees with the table's listing. The table gives no figure and no prose; the cold floor is the habitat's alone.

Climate across the habitat

Habitat months, southern hemisphere

Habitat climate of Aristea bakeri through the yearWarmest months January and February, mean daily high 24 °C; coldest month July, mean nightly low 7.0 °C; 846 mm of rain in the median year (the twelve monthly medians added). Medians across the range, from CHELSA; the extremes at the edge from NASA POWER. Habitat months, southern hemisphere.0°5°10°15°20°25°30°35°30.9° 99th-percentile day, NASA POWER3.9° lowest night in 44 years, NASA POWER°C · day and nightcold quarter0100200300400mm rainDLI 16–50RH 58–61%JanFebMarAprMayJunJulAugSepOctNovDec
day night rain medians and 10th–90th percentile across 118 habitat cells, CHELSA cold quarter: the three months around the coldest month's mean nightly low extremes over 44 years at a typical spot in the range, from NASA POWER, marked at the edge, in no month DLI, mol/m²/dayRH %each on its own scale
Figures by month
JanFebMarAprMayJunJulAugSepOctNovDec
Day °C24 / 20–2824 / 21–2823 / 19–2621 / 18–2318 / 16–2016 / 14–1715 / 13–1716 / 14–1717 / 15–1919 / 16–2221 / 18–2422 / 19–26
Night °C15 / 13–1816 / 14–1815 / 13–1713 / 10–1510 / 8–148 / 4–127 / 4–118 / 4–119 / 6–1211 / 8–1312 / 10–1514 / 12–17
Rain mm44 / 24–7434 / 21–5748 / 29–8276 / 56–13682 / 45–249103 / 38–309115 / 43–31098 / 58–25974 / 39–19265 / 39–12158 / 31–10049 / 24–87
DLI50 / 47–5344 / 41–4736 / 33–3926 / 24–2819 / 18–2116 / 15–1717 / 16–1922 / 21–2430 / 29–3239 / 37–4147 / 44–4950 / 47–53
RH %60 / 55–6461 / 55–6461 / 55–6460 / 55–6358 / 55–6258 / 54–6158 / 54–6160 / 57–6261 / 58–6260 / 56–6260 / 55–6360 / 55–63
How this section is made
Each figure is the median across the 118 grid cells holding the 442 in-range records, with the 10th–90th percentile span across those cells after the slash where it differs. A dash is a month one or more of those cells has no figure for in the grid (a variable CHELSA does not carry there), so no median is taken rather than one over fewer cells. Extremes and elevation were read at a typical spot in the range, cell 2488:3992 (-34.425, 19.625). Over 44 years there: absolute minimum 3.9 °C, 1st-percentile night 6.2 °C, 99th-percentile day 30.9 °C. Normals: CHELSA V2.1 1981–2010 climatology, 0.05° cells (each the mean of ~36 1 km pixels). Across the range: median and 10th–90th percentile of each month across the 118 distinct grid cells holding 442 of the 442 in-range records; extremes and elevation at the typical cell 2488:3992 (its coldest month's mean nightly low nearest the median across cells); its position is the cell centre. Extremes: NASA POWER (MERRA-2) daily 1981–2024, cell -34.50_19.375, lapse-corrected +140 m at 6.5 °C/km. Elevation: ETOPO 2022, 271 m (cell mean).

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing: the climate was read across the cells of the in-range records placed well enough to read one, not at the marker.
Openly licensed records inside the range, framed on where they fall.
NativeCape Provinces · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker-33.996, 18.485 · in the densest population, 416 records (80% of those in range)
Kew's description“rhizomatous geophyte” · “subtropical” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 517 georeferenced records inside the native range; the climate across the range on the 442 of them placed to within 10 km; the map shows only the 136 openly licensed ones, which alone would put the marker 49 km away. 75 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 517 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Aristea bakeri, photograph 1did not loadAristea bakeri, photograph 2did not loadAristea bakeri, photograph 3did not loadAristea bakeri, photograph 4did not loadAristea bakeri, photograph 5did not loadAristea bakeri, photograph 6did not load

Photographs: Nicola van Berkel, CC BY-SA, iNaturalist via GBIF (6).

Similar habitat climate The 6 nearest by mean daily high, mean nightly low and rain, month by month. How.

Moraea ramosissima Moraea ramosissima Vlei Clockflower Photo: CC BY-SA, magriet bErica hispidula Erica hispidula Wind Heath Photo: CC BY, Jessica UtrupProtea cynaroides Protea cynaroides King protea Photo: CC BY, Ren HoekstraUrsinia paleacea Ursinia paleacea Fire Paraseed Photo: CC BY-SA, Nicola van BerkelProtea coronata Protea coronata Green Sugarbush Photo: CC BY, Karen EichholzErica cruenta Erica cruenta Blood Heath Photo: CC BY, André Deschodt

Other Aristea 6 in the reference

Aristea abyssinica Aristea abyssinica Blue-Eyed Grass Photo: CC BY, Sunčana BradleyAristea africana Aristea africana African Capeblue Photo: CC BY, Adele SLAristea capitata Aristea capitata Blue Sceptre Photo: CC BY, Adele SLAristea ecklonii Aristea ecklonii Blue corn-lily Photo: CC BY-SA, readynowAristea ensifolia Aristea ensifolia Forest Capeblue Photo: CC0, David RosenthalAristea pusilla Aristea pusilla Iridaceae Photo: CC BY, Christiaan Viljoen

Names & registers

Also known as Aristea confusa; Aristea macrocarpa; Aristea paniculata. (GBIF Backbone)

Registers not checked Wikidata did not answer when this page was built, so the links it gives (POWO, IPNI, World Flora Online, Wikipedia) were not checked; any shown here are kept from an earlier build. Not asked, or not answered, is not "none": nothing here claims there is none. Why the site says it this way.
GBIFWikipedia

The record

Family
Iridaceae
Described by
Klatt
Native to
Cape Provinces
Wild records
517 in range · 136 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-21
GBIF species record gbif.species answeredasked 2026-10-21
GBIF synonyms gbif.synonyms answeredasked 2026-10-21
GBIF common names gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 12 records within 1 km of a botanic garden, herbarium or zoo left out (7 at a botanic garden or arboretum, 5 at a herbarium; Wikidata's list)
Habitat climate climate answeredasked 2026-10-21
Daily extremes (NASA POWER) climate.extremes answeredasked 2026-10-21NASA POWER (MERRA-2) daily 1981–2024, cell -34.50_19.375, lapse-corrected +140 m at 6.5 °C/km
Wikidata wikidata failedasked 2026-10-21query.wikidata.org timeout (batched: Wikidata's query service, 200 GBIF keys)
Wikipedia wikipedia answeredasked 2026-10-21
iNaturalist taxon inat.taxon not asked
iNaturalist photographs, wild inat.photos.wild not asked
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 8 datasets via GBIF.org; each carries its own licence.

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